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Upper limits on the stochastic gravitational-wave background from Advanced LIGO's first observing run
Abbott, BP and Abbott, R and Siellez, K and Zweizig, J, LIGO Scientific Collaboration and Virgo Collaboration, Upper limits on the stochastic gravitational-wave background from Advanced LIGO's first observing run, Physical Review Letters, 118, (12) Article 121101. ISSN 0031-9007 (2017) [Refereed Article]
© 2017 American Physical Society.
A wide variety of astrophysical and cosmological sources are expected to contribute to a stochastic gravitational-wave background. Following the observations of GW150914 and GW151226, the rate and mass of coalescing binary black holes appear to be greater than many previous expectations. As a result, the stochastic background from unresolved compact binary coalescences is expected to be particularly loud. We perform a search for the isotropic stochastic gravitational-wave background using data from Advanced Laser Interferometer Gravitational Wave Observatory's (aLIGO) first observing run. The data display no evidence of a stochastic gravitational-wave signal. We constrain the dimensionless energy density of gravitational waves to be ?0<1.7x10-7 with 95% confidence, assuming a flat energy density spectrum in the most sensitive part of the LIGO band (20-86 Hz). This is a factor of ~33 times more sensitive than previous measurements. We also constrain arbitrary power-law spectra. Finally, we investigate the implications of this search for the background of binary black holes using an astrophysical model for the background.
|Item Type:||Refereed Article|
|Keywords:||Gravitational wave, Stochastic gravitational-wave background, Advanced LIGO|
|Research Division:||Physical Sciences|
|Research Group:||Astronomical sciences|
|Research Field:||General relativity and gravitational waves|
|Objective Division:||Expanding Knowledge|
|Objective Group:||Expanding knowledge|
|Objective Field:||Expanding knowledge in the physical sciences|
|UTAS Author:||Siellez, K (Dr Karelle Siellez)|
|Web of Science® Times Cited:||173|
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